基于互联互通的区域控制器安全通信计算机设计

Design of ZC Safety-related Communication Computer to Achieve Interoperability

为了实现列车在不同厂商提供设备的城市轨道交通线路或网络中安全运营、共线混跑以及资源共享,基于通信的列车控制系统互联互通已成为一个重要课题。根据正在起草的互联互通的行业技术规范,为满足不因通信中断而倒机的需求,提出一种实现区域控制中心与其他信号系统通信的专用二乘二取二安全通信计算机的方案,设计其软硬件系统结构、平台内部冗余的连接方式,对单系内的双CPU同步和数据安全比较、双系间的主备同步等关键算法进行研究,并针对安全通信协议中描述的风险设计相应的防御措施。

Since the rail transits and the related facilities in cities are manufactured by different firms, the realization of safe op- eration and resource sharing for trains through interoperability of communications-based train control （CBTC） has become an important subject. Based on the technical specifications of interoperability which are currently being drafted, this paper proposes a scheme of a double 2-vote-2 safety-related communication computer which can achieve the communication between the zone controller （ZC） and other signal systems and will not switch when the communication is interrupted. The hardware and software system as well as the redundant connection inside the ZC platform are designed. The key algorithm to the double CPU synchro- nization and data safety comparison in the single system and the main-standby synchronization in the dual system are studied. The defense measures are also designed according to the risk described in the security communication protocol.